SF6 gas insulated HV AC test systems are widely used for factory testing of GIS and their metal-clad components, especially instrument transformers, and for on-site testing as well.
They are metal-clad encapsulated, can be directly flanged to test object, so test system and test object are fully encapsulated. This allows a space saving test setup without safety clearances between test system or test object and walls or other objects.
The test system and test object become a closed system with a low PD background noise level when directly flanged. This feature makes the model ideally suited for sensitive PD measurements.
In factory, these systems allow to test sub-assemblies and components directly in the manufacturing line, thus avoiding transportation to a central test facility, and extra handling.
Furthermore, they can also be used for AC voltage test of other HV apparatus when equipped with output bushing.
Application
HVAC transformer based GIS test systems are mainly used for:
1
Factory testing of small complete GIS, such as spacers, electrodes, instrument transformers, disconnectors, circuit breakers, and small complete GIS systems.
2
Factory testing of voltage with GIS (the test system can be provided with a power supply for higher frequencies).
3
Test of accessories, e.g. SF6 to air or SF6 to oil bushings.
4
Research, development and education.
The test systems can be used as voltage source for PD measurement. They are directly flanged to the test object, so that test system and test object are fully encapsulated. This allows a space saving test setup without safety clearances between test system or test object and walls or ceiling.
Features
Long running time, breaking the bottleneck of short-term running of domestic and foreign products for 30 minutes, and continuous running.
The partial discharge is small, and the rated voltage is < 1 pc.
The rated output voltage is 1500kV, with high voltage level.
The running current is large, and the rated output can be 5A.
It can save space and distance, and it only needs to be matched with the mouth of the sample.
Reduce the one-time investment of the factory without shielding hall.
According to the needs of users, the shell can be made of aluminum or iron.
Main Configurations
Primary power switchgear
Double shielded isolation transformer
200kVA 0.415kV 0~3.3kV Voltage regulator
Secondary power switchgear
200kVA 3kV Power noise filter
Over-voltage fast protect device
800kVar 3kV Compensation reactor
800kVA 800kV Encapsulated SF6 test transformer
800kV 1A 3kΩ Protect resistor
500pF 800kV Capacitor divider
Computer control and measure system
Power frequency peak value voltmeter
Products Parameters
No.
Parameters
Specifications
1
Model
YDQW
2
Rated voltage
300 to 1250kV
3
Rated current
0.1 to 5A
4
Control
Manual & Automatic Computer control
Reference
Profile
Operating in the electricity industry, we specialize in developing and providing high-voltage testing equipment, including AC Dielectric, HV DC Voltage, Impulse Voltage, Impulse current and other special tests, rating up to 2400kV AC, 2000kV DC, 7200kV Impulse. We started cooperating with Shanghai Jiaotong University for producing and research of HV testing equipment used in electrical applications since 1980s. With a focus on long-term maintenance, laboratory services, and consulting/testing, we offer comprehensive solutions for research, manufacturing, or maintenance purposes.
We are a leading manufacturer in the Electricity industry with a highly skilled R&D team. Our advanced technology allows us to produce high-quality products efficiently. We utilize state-of-the-art production equipment that ensures precision and reliability. Our strong R&D capabilities enable us to continuously innovate and develop cutting-edge solutions that meet the evolving demands of our industry.
Our factory is a leading player in the Electricity industry, boasting a spacious area of 80000sqm with a 50m height highest rating full shielded HV test hall. We take pride in our exceptional quality inspection capabilities, ensuring that all products meet the highest standards. With a focus on production efficiency, we have invested in state-of-the-art equipment that enables us to maximize output while maintaining top-notch quality. Our production capacity is unmatched, allowing us to meet the demands of our esteemed clients efficiently and effectively.
Workshop
Test Lab
Frequently Asked Questions (FAQ)
Q What are the primary applications of SF6 Gas Insulated AC Test Transformers?
They are extensively used for factory and on-site testing of GIS (Gas Insulated Switchgear), instrument transformers, disconnectors, circuit breakers, spacers, electrodes, and other high-voltage apparatus.
Q How does the directly flanged encapsulated design benefit testing?
Direct flanging establishes a fully encapsulated, closed testing system. This design prevents high-voltage sparkovers, significantly lowers partial discharge (PD) background noise, and saves space by eliminating safety clearance requirements between the test setup and walls.
Q What are the main specifications and rating ranges of the YDQW model?
The YDQW model features a rated voltage of 300 to 1250kV, a rated current ranging from 0.1 to 5A, and is controllable via manual or automatic computer systems.
Q What key features make this system suitable for continuous factory operation?
It supports long continuous running times, overcoming the typical 30-minute limit of traditional systems. It also boasts very low partial discharge (< 1 pC at rated voltage) and a high rated output voltage up to 1500kV.
Q What components are included in the typical configuration?
The standard system includes primary and secondary power switchgear, double-shielded isolation transformers, a voltage regulator, a power noise filter, over-voltage fast protection devices, compensation reactors, capacitor dividers, and a computer control and measurement system.
Zeno Electric
